SimplySwim has the ability to book make-ups across multiple levels.
This option needs to be configured.
1. Go to Configuration.
2. Click Class Assessment Level Groups
3. Click Add Class Assessment Level Group
4. Name your group something appropriate and save it.
5. Click on Add/Modify Level.
6. Select the levels you would like to group together. Keeping in mind that all levels in the group will be able to book make-ups with the other.
7. Set-up Multiple Groups to meet your needs.
Booking a make-up with then be the same process just allowing you to book into the grouped levels as well.